Sensors and Their Specifications
Linear Imaging Self-Scanning System I (LISS-I)
LISS-I (Linear Imaging self Scanner) was a payload for the IRS-1A satellite.
This camera operated in four spectral bands. It operated in a push-broom
scanning mode using a CCD array. Each band used 2 CCD's which were
staggered in the focal plane. It was again used in IRS-1B. It used 7 bit
quantization, and had a swath of 148 Kms. Images of LISS-I were extensively
used in forestry, crop acreage, yeild estimation, drought monitoring, flood
monitoring etc.
Band Details
Resolution
(m)
Swath
Width
(km)
Sensor
Channels
Spectral Bands
(µm)
Revisit
Time
148
LISS-I-1
LISS-I-2
LISS-I-3
LISS-I-4
0.45-0.52 (blue)
0.52-0.59 (green)
0.62-0.68 (red)
0.77-0.86 (near IR)
22
72
LISS-II was similar to LISS-I, but with higher spatial resolution and smaller
swath. it was on payload in three satellites : IRS-1A, IRS-1B, IRS-P2.
Band
S K Diwakar
Wavelength Resolution Swath
(µm)
(m)
Width
(km)
Revisit
time
(days)
Band 1 (blue)
0.46 to
0.52
36.25
74
(145)
22
Band 2 (green)
0.52 to
0.59
36.25
74
(145)
22
Band 3 (red)
0.62 to
0.68
36.25
74
(145)
22
Band 4 (NIR)
0.77 to
0.86
36.25
74
(145)
22
Sensors and Their Specifications
LISS-III
The LISS-III (Linear Imaging Self Scanning Sensor) sensor is an optical sensor
working in four spectral bands (green, red, near infrared and short wave
infrared). It covers a 141km-wide swath with a resolution of 23 meters in all
spectral bands.
Band
Wavelength
(µm)
Band 1
(VIS)
0.52 to 0.59
Band 2
(VIS)
0.62 to 0.68
Band 3
(NIR)
0.77 to 0.86
Band 4
(SWIR)
1.55 to 1.7
Resolution
(m)
Swath
Width
(km)
Revisit time
(days)
23.5
142
5
23.5
142
5
23.5
142
5
70.5
148
5
LISS-IV sensor
LISS-IV can work either in panchromatic or in multispectral mode with the
same bands as LISS-III (except SWIR). However, the resolution is much
better (5.8 m). For Resourcesat-1, the swath width varies from 23.9 km in
multispectral mode to 70.3 km in panchromatic mode. For Resourcesat-2,
the multispectral swath is enhanced to 70 km. The linear array sensor can
be steered up to 26 degrees across-track, enabling stereoscopic imaging.
Mode
Panchromatic
Spectral band
Resolution
Number of Array
0.50 – 0.75 µm
58 x 5.8 m
3
Mode
Spectral band
Multispectral
S K Diwakar
Band
Resolution
2
0.52 – 0.59 µm
5.8 x 5.8 m
3
0.62 – 0.68 µm
5.8 x 5.8 m
4
0.77 – 0.86 µm
5.8 x 5.8 m
Number of
Array
1